21320088196 has 27 divisors (see below), whose sum is σ = 41016514917. Its totient is φ = 9689489040.

The previous prime is 21320088143. The next prime is 21320088199. The reversal of 21320088196 is 69188002312.

The square root of 21320088196 is 146014.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 313644100 + 21006444096 = 17710^2 + 144936^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21320088199) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3208990 + ... + 3215626.

Almost surely, 2^21320088196 is an apocalyptic number.

21320088196 is the 146014-th square number.

It is an amenable number.

21320088196 is a deficient number, since it is larger than the sum of its proper divisors (19696426721).

21320088196 is an frugal number, since it uses more digits than its factorization.

21320088196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13300 (or 6650 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The spelling of 21320088196 in words is "twenty-one billion, three hundred twenty million, eighty-eight thousand, one hundred ninety-six".